David p



(No Model.)

D. P. STEWART.

PUMP.

Patented Mar. 17, 1885.

nur, wmningum. n. C.

nUNTTED STATES PATENT EETCE.

DAVID r. STEWART, or BUFFALO, NEW YORK.

sphere-marroni fai-ming pai-t of Letters Patent No. 314,078, daaMarcb 17, 1885.

i Application filed April 9, 1884. (No model.)

fo @ZZ whom, it 77mg coli/cern.'

'Be it known that I, DAVID P. STEWART, of the city ot' Buffalo, in the county of Erie and State of New York, have invented new and useful Improvements in Feed-Pumps, of which the following is a specification.

This invention relates more particularly to that class of feed-pumps in which a recipro-I cating tubular plunger or piston is operated by means of an actuating-rod pivot ally secu red thereto, and which has an oscillating movement within the bore of the plunger.

The object of my invention is to provide a simple and durable means for securing the connecting-rod to the plunger or piston, whereby a firm connection between these'parts is maintained at all times; and it consists of the irnprovements, which will be hereinafter described, and pointed out in the claims.

In the accompanying drawings, Figure 1' represents a vertical sectional elevation of a feed-pump provided with iny improvements. Fig. 2 is a similar View at right angles to Fig. l. Fig. 3 is a horizontal cross-section of the plunger, connecting-rod, and adjustable bearings. Fig. 4 is a top plan view ofthe plunger. Fig. 5 is an elevation of the end ot' the connecting-rod which is secured to the plunger. Fig. 6 is an elevation of one of the adjustable bearings.

Like letters of reference referto like parts in the several igures.

A represents the pump-cylinder, which is cast with or otherwise secured to a frame, A', and provided with the usual inlet and outlet ports, a c. y

B represents the tubular plunger, and C the stuffing-box, through which the plunger B plays in the cylinder A, a reciprocating motion being imparted to the plunger B by means of the connecting-rod D and crank E. The upper end of the connecting-rod D is secured to the crank E, which is formed on the end of a horizontal shaft, e, journaled in bearings secured to the frame A. Motion is imparted to the shaft e by a driving-pulley, G.

The opposite or lower end of the connecting-rod is provided with a T-shaped head or knuckle, d, having a cylindrical body, which is seated in a semicircular groove or recess, b, formed in the head b of the plunger.

The

groove b extends across the head b', and is preferably made large enough to receive the lowerhalfofthe cylindrical bodyot'thcknucklc d, the upper cylindrical surface of the knuckle lying above the plane of the head b of the plunger.

h lz are two U -shaped bearings or caps, which rest upon the knuckle d on either side of the connecting-rod and within t-he tubular plunger, and retain `the knuckle d of the connectingrod in its seat. The bearings or caps hare provided with vertical arms IL', which extend upwardly to within a short distance from the top of the plunger. The outer vertical sides of the arms h and the bearings h are preferably curved to tit closely against the inner wall of the tubular plunger. 1

i t' are two inwardly-projecting lugs or ears formed on diam'etrical opposite sides of the cylindrical body of the plunger, as shown in Fig. 4. The lugs i are provided with screwthreaded openings,in which are inserted screwbolts k, having jam-nuts 7c'. The ends of the bolts 7c below the lugs are preferably seated in sockets formedin the upper end of the arms and retain the bearings or caps h in their proper position upon the knuckle d. The connecting-rod is in this manner firmly attached to the plunger, while the cylindrical part of the knuckle and its bearings permit the requisite oscillatory movement of the connecting-rod within the bore of the plunger in adjusting itself to the movement of the crank.

Any wear resulting from the continuous rocking movement of the knuckle or head d in its seat in reciprocating the piston can be readily taken up without removing any of the parts by means of the screw-bolts k, and the latter are firmly held in place from accidental turning by the jam-'nuts lc'.

It is evident that my invention can be applied to engines and other machines in which a tubular plunger or piston and a connectingrod pivoted thereto are employed.

I claim as my invention* 1. The combination, 'with the piston or plunger B, ot' the connecting-rod D, provided with a head or knuckle, d, bearings h, having 'vertical arms h', and screw-bolts k, substantially as set forth.

2. The combination, with the piston or IOG ed With vertical arms h, screw-bolts 7c, and jam-nuts k, substantially as set forth.

Witness myhand this 1st day ofApril,.l884.

DAVID P. STEVART.

Witnesses:

J No. J. BONNER, CARL F. GEYER. 

